Extended X-ray emission from the z=4.26 radio galaxy 4C 63.20

Abstract

We report on deep Chandra X-ray Telescope imaging observations of 4C 63.20, one of the few known radio galaxies at z>3.5. The X-ray counterpart is resolved into a core plus two off-nuclear sources that (combined) account for close to 30% of the total X-ray flux. Their morphology and orientation are consistent with a diffuse, lobe-like nature, albeit compact hotspots cannot be ruled out. The broadband spectral energy distribution of 4C 63.20 can be reproduced with a jet model where the majority of the radio flux can be ascribed to synchrotron emission from the hotspots, whereas the (non-nuclear) X-ray emission is produced via Inverse Compton (IC) off of Cosmic Microwave Background (CMB) photons within the extended lobes. This scenario is broadly consistent with the expectation from highly magnetized lobes in a hotter CMB, and supports the view that IC/CMB may quench less extreme radio lobes at high redshifts.

arXiv comment10 pages, 8 figures, accepted to MNRAS

References in corpus (24)

• The Leiden/Argentine/Bonn (LAB) Survey of Galactic HI: Final data release of the combined LDS and IAR surveys with improved stray-radiation corrections
• Cluster Magnetic Fields
• Canonical high power blazars
• The power of relativistic jets is larger than the luminosity of their accretion disks
• An X-ray study of magnetic field strengths and particle content in FRII radio sources
• The Evolution of Swift/BAT blazars and the origin of the MeV background
• The origins of X-ray emission from the hotspots of FRII radio sources
• The Spitzer High Redshift Radio Galaxy Survey
• The evolution of the Compton thick fraction and the nature of obscuration for AGN in the Chandra Deep Field South
• Blazars in the early Universe
• An X-ray jet discovered by Chandra in the z=4.3 radio-selected quasar GB 1508+5714
• Blazar candidates beyond redshift 4 observed by Swift
• Keck Observations of the Most Distant Galaxy: 8C1435+63 at z=4.25
• Radio-loud AGNs at high redshifts and the cosmic microwave background
• Modeling the Counts of Faint Radio Loud Quasars: Constraints on the Supermassive Black Hole Population and Predictions for High Redshift
• Mean and Extreme Radio Properties of Quasars and the Origin of Radio Emission
• Extended X-ray emission in the high redshift quasar GB 1508+5714 at z=4.3
• Inverse-Compton ghosts and double-lobed radio sources in the X-ray sky
• Radio-Selected Quasars in the Sloan Digital Sky Survey
• Extended X-ray emission at high redshifts: radio galaxies versus clusters
• X-ray spectral properties of high-redshift radio-loud quasars beyond redshift 4--first results
• A Bayesian Analysis of SDSS J0914+0853, a Low-Mass Dual AGN Candidate
• CMB-induced radio quenching of high-redshift jetted AGNs with highly magnetic hotspots
• A Chandra Snapshot Survey of Representative High-Redshift Radio-Loud Quasars from the Parkes-MIT-NRAO Sample

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• Enhanced X-ray Emission from the Most Radio-Powerful Quasar in the Universe's First Billion Years
• Proof of CMB-driven X-ray brightening of high-z radio galaxies
• The Impact of the CMB on the Evolution of high-z Blazars
• The extremely X-ray luminous radio-loud quasar CFHQS J142952+544717 at $z=6.18$ under Chandra high-angular resolution lens